Help me with my math：对
Help me with learning math：不地道.learning 用得多余,Help me with my math 已含有 learn 的意思（= Help me [to] learn math）
Help me with dance 不好,但可以说 Help me with this dance,或 Help me with dance skills
Help me with dancing 可以.此处 dancing = dance skills
What‘s your job? 没问题,问的是干什么类型工作,如教师、司机等.
What's your work? 也没错（= What do you work on?）,问的是你具体做什么事,如打字、操作机器等.